Method and device for transmitting PUSCH in wireless communication system

1. A method for transmitting, by a user equipment (UE), a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the method comprising:

receiving a higher layer message including information related to a configuration of a PUSCH (multi-TU PUSCH) transmitted in a plurality of time units, the plurality of time units (TUs) being classified into a plurality of TU groups;

receiving a lower layer message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH;

determining beams for each of remaining TU groups other than at least one specific TU group of the plurality of TU groups based on the lower layer message;

determining a beam for at least one specific TU group based on the beams for each of the remaining TU groups; and

transmitting the multi-TU PUSCH based on the determined beams,

wherein the lower layer message includes information indicating at least one spatial relation RS applied to each of the remaining TU groups, and

wherein the beam for at least one specific TU group is determined as a preconfigured beam.

2. The method of claim 1 , wherein the time unit (TU) is defined as one or a plurality of slots or symbol(s).

3. The method of claim 1 , wherein the preconfigured beam is configured as a beam (spatial filter) for at least any one TU group among the remaining TU groups, and a beam satisfying a specific condition.

4. The method of claim 3 , wherein a difference value in angle of departure between the beam satisfying the specific condition and the beam (spatial filter) for at least any one TU group among the remaining TU groups is a specific value or is within a specific range.

5. The method of claim 1 , wherein the beam for each TU group included in the plurality of TU groups among the determined beams is related to at least one layer of all layers related to the transmission of the multi-TU PUSCH.

6. The method of claim 5 , wherein the all layers are classified into a plurality of layer groups including at the at least one layer, and

wherein the beam for each TU group is applied to each layer group among the plurality of layer groups.

7. The method of claim 5 , wherein the beam for each group is applied to the all layers.

8. The method of claim 1 , further comprising:

grouping the plurality of time units (TUs) into K TU groups based on the higher layer message.

9. The method of claim 8 , wherein the higher layer message includes information related to the number N of the plurality of time units (TUs), and

the grouping is performed so that a deviation of the number of TUs which belong to each TU group among the K TU groups becomes minimum based on the number N of the plurality of time units (TUs).

10. The method of claim 8 , wherein the determined beams are related to K spatial relation RS sets, and

wherein the spatial relation RS set is comprised of at least one spatial relation RS, and mapped to each TU which belongs to the plurality of time units (TUs).

11. The method of claim 10 , wherein the mapped spatial relation RS set is changed for each TU among the plurality of time units (TUs).

12. The method of claim 10 , wherein the mapped spatial relation RS set is changed for each TU group which belongs to the K TU groups.

13. The method of claim 10 , wherein the mapped spatial relation RS set is changed every at least two TUs among the plurality of time units (TUs).

14. The method of claim 1 , wherein the higher layer message further includes a plurality of spatial relation states,

wherein a constitution of each spatial relation state included in the list is configured by a multiple access control-control element (MAC CE), and

wherein the spatial relation state is comprised of at least one spatial relation RS applied to the remaining TU groups.

15. The method of claim 14 , wherein the lower layer message is Downlink Control Information (DCI), and

wherein information indicating the at least one spatial relation RS is related to any one spatial relation state of the plurality of spatial relation states.

16. A user equipment (UE) for transmitting a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the UE comprising:

one or more transceivers;

one or more processors; and

one or more memories operably connectable to the one or more processors, and storing instructions of performing operations when executed by the one or more processors,

wherein the operations include

receiving a higher layer message including information related to a configuration of a PUSCH (multi-TU PUSCH) transmitted in a plurality of time units, the plurality of time units (TUs) being classified into a plurality of TU groups,

receiving a lower layer message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH,

determining beams for each of remaining TU groups other than at least one specific TU group of the plurality of TU groups based on the lower layer message,

determining a beam for at least one specific TU group based on the beams for each of the remaining TU groups, and

transmitting the multi-TU PUSCH based on the determined beams,

wherein the lower layer message includes information indicating at least one spatial relation RS applied to each of the remaining TU groups, and

wherein the beam for at least one specific TU group is determined as a preconfigured beam.

17. A device comprising:

one or more memories; and

one or more processors functionally connected to the one or more memories,

wherein the one or more processors are configured to control the device to

receive a higher layer message including information related to a configuration of a PUSCH (multi-TU PUSCH) transmitted in a plurality of time units, the plurality of time units (TUs) being classified into a plurality of TU groups,

receive a lower layer message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH,

determine beams for each of remaining TU groups other than at least one specific TU group of the plurality of TU groups based on the lower layer message,

determine a beam for at least one specific TU group based on the beams for each of the remaining TU groups, and

transmit the multi-TU PUSCH based on the determined beams,

wherein the lower layer message includes information indicating at least one spatial relation RS applied to each of the remaining TU groups, and

wherein the beam for at least one specific TU group is determined as a preconfigured beam.